arm: stm32mp: move code for STM32MP15x

Move code and defines only needed for CONFIG_STM32MP15x in stm32mp15x.c
when low level init without TFABOOT is supported.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/fdt.c b/arch/arm/mach-stm32mp/fdt.c
index b1a4b76..7412f0e 100644
--- a/arch/arm/mach-stm32mp/fdt.c
+++ b/arch/arm/mach-stm32mp/fdt.c
@@ -312,16 +312,16 @@
 	}
 
 	switch (get_cpu_package()) {
-	case PKG_AA_LBGA448:
+	case STM32MP15_PKG_AA_LBGA448:
 		pkg = STM32MP_PKG_AA;
 		break;
-	case PKG_AB_LBGA354:
+	case STM32MP15_PKG_AB_LBGA354:
 		pkg = STM32MP_PKG_AB;
 		break;
-	case PKG_AC_TFBGA361:
+	case STM32MP15_PKG_AC_TFBGA361:
 		pkg = STM32MP_PKG_AC;
 		break;
-	case PKG_AD_TFBGA257:
+	case STM32MP15_PKG_AD_TFBGA257:
 		pkg = STM32MP_PKG_AD;
 		break;
 	default: